662722549 has 2 divisors, whose sum is σ = 662722550. Its totient is φ = 662722548.

The previous prime is 662722531. The next prime is 662722589. The reversal of 662722549 is 945227266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 435014449 + 227708100 = 20857^2 + 15090^2 .

It is a cyclic number.

It is not a de Polignac number, because 662722549 - 2⁷ = 662722421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662722519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331361274 + 331361275.

It is an arithmetic number, because the mean of its divisors is an integer number (331361275).

Almost surely, 2^662722549 is an apocalyptic number.

It is an amenable number.

662722549 is a deficient number, since it is larger than the sum of its proper divisors (1).

662722549 is an equidigital number, since it uses as much as digits as its factorization.

662722549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The square root of 662722549 is about 25743.3981634127. The cubic root of 662722549 is about 871.8543040852.

The spelling of 662722549 in words is "six hundred sixty-two million, seven hundred twenty-two thousand, five hundred forty-nine".